First, the use of safety instructions for the use of fume hoods
The safety instructions for fume hoods are an integral part of clean laboratory equipment. In a scientific laboratory environment, good ventilation is used to create a clean laboratory environment, to ensure the scientificity of the experimental conditions, reliability, and during the experiment. The safety is very important; therefore, the safety instructions for the fume hood should pay attention to the following points:
1. The indoor air temperature is between -5 °C +40 °C, and the 24- hour average does not exceed +25 °C;
2 , the laboratory should also be ventilated when not using the fume hood, which is beneficial to the health of the test personnel;
3, when two or more common use of a fume hood fan, in order to avoid errors or improper operation, the fan "ON" "OFF" can be controlled by an operator; As another fume hood or used temporarily To stop using, use the air volume control valve to close the vent; avoid repeating the "open" and "off" fans, which not only damages the life of the fan, but also is not accurate for the experiment.
4. When the fume hood is in use, avoid the interference of the countercurrent wind direction caused by the person walking to the fume hood;
5. When the fume hood is in use, it will be replenished for 10 minutes every 2 hours (ie, window ventilation); if it is used for more than 5 hours, open the window to avoid negative pressure inside the room.
Second, security matters
For the safety of the laboratory, please pay attention to the following matters:
1. It is forbidden to conduct experimental courses in the fume hood when the fume hood is not opened;
2. It is forbidden to put the head into the fume hood to operate or view during the experiment;
3. It is forbidden to store or test inflammable and explosive materials in the fume hood;
4. It is forbidden to put the mobile patch cord or electric wire in the fume hood;
5. It is forbidden to do the experiment of mixing organic substances prohibited by the state with high-chlorine compounds in the fume hood;
6. It is forbidden to place the tested substance in the fume hood without safety. Once the chemical substance splashes out, the power should be cut off immediately;
7. When moving the upper and lower windows, you should operate slowly and gently, so as not to crush the hand by the door handle;
8. During the experiment, it is better to use the window 100-150mm from the table top ;
9. The operating area of ​​the fume hood should be kept clear, and avoid stacking items around the fume hood;
10. If the fume hood is faulty or if the fan sound is wrong, it must be stopped. It must be repaired by professional maintenance personnel. It cannot be disassembled and repaired by itself.
11. When the operator does not use the fume hood, the ventilated countertop should avoid storing too much test equipment or chemical substances, and prohibit long-term stacking;
12 , if there is poor ventilation, please get in time with the supplier.
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